Add example of E2 subscription via REST + alarm raising

[ric-plt/xapp-frame.git] / examples / cmd / example-xapp.go

diff --git a/examples/cmd/example-xapp.go b/examples/cmd/example-xapp.go
index 8fe7873..a08844b 100755 (executable)
--- a/examples/cmd/example-xapp.go
+++ b/examples/cmd/example-xapp.go
@@ -14,21 +14,28 @@
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
+
+   This source code is part of the near-RT RIC (RAN Intelligent Controller)
+   platform project (RICP).
 ==================================================================================
 */
 package main
 
 import (
+       "gerrit.o-ran-sc.org/r/ric-plt/alarm-go.git/alarm"
+       "gerrit.o-ran-sc.org/r/ric-plt/xapp-frame/pkg/clientmodel"
        "gerrit.o-ran-sc.org/r/ric-plt/xapp-frame/pkg/xapp"
        "net/http"
 )
 
 // This could be defined in types.go
 type ExampleXapp struct {
-       msgChan    chan *xapp.RMRParams
-       stats      map[string]xapp.Counter
-       rmrReady   bool
-       waitForSdl bool
+       msgChan               chan *xapp.RMRParams
+       stats                 map[string]xapp.Counter
+       rmrReady              bool
+       waitForSdl            bool
+       subscriptionInstances []*clientmodel.SubscriptionInstance
+       subscriptionId        *string
 }
 
 func (e *ExampleXapp) handleRICIndication(ranName string, r *xapp.RMRParams) {
@@ -67,6 +74,47 @@ func (e *ExampleXapp) messageLoop() {
        }
 }
 
+func (e *ExampleXapp) Subscribe() {
+       // Setup response callback to handle subscription response from SubMgr
+       xapp.Subscription.SetResponseCB(func(resp *clientmodel.SubscriptionResponse) {
+               if *e.subscriptionId == *resp.SubscriptionID {
+                       for _, s := range resp.SubscriptionInstances {
+                               e.subscriptionInstances = append(e.subscriptionInstances, s)
+                       }
+               }
+       })
+
+       // Fill subscription parameters: type=REPORT
+       ranName := "en-gnb:369-11105-aaaaa8"
+       functionId := int64(1)
+       clientEndpoint := "localhost:4560"
+
+       reportParams := clientmodel.ReportParams{
+               Meid:           ranName,
+               RANFunctionID:  &functionId,
+               ClientEndpoint: &clientEndpoint,
+               EventTriggers: clientmodel.EventTriggerList{
+                       &clientmodel.EventTrigger{
+                               InterfaceDirection: int64(0),
+                               ProcedureCode:      int64(27),
+                               TypeOfMessage:      int64(1),
+                       },
+               },
+       }
+
+       // Now subscribe ...
+       if resp, err := xapp.Subscription.SubscribeReport(&reportParams); err == nil {
+               e.subscriptionId = resp.SubscriptionID
+               xapp.Logger.Info("Subscriptions for RanName='%s' [subscriptionId=%s] done!", ranName, *resp.SubscriptionID)
+               return
+       }
+
+       // Subscription failed, raise alarm (only for demo purpose!)
+       if err := xapp.Alarm.Raise(8006, alarm.SeverityCritical, ranName, "subscriptionFailed"); err != nil {
+               xapp.Logger.Info("Raising alarm failed with error: %v", err)
+       }
+}
+
 func (e *ExampleXapp) Consume(rp *xapp.RMRParams) (err error) {
        e.msgChan <- rp
        return